移动通信不规则传播环境多普勒频谱仿真与分析

Analysis and simulation of effect of the irregular propagation environment on the Doppler spectrum in mobile communication

对移动通信不同数目散射体分布下的接收信号多普勒频谱进行了仿真与分析 ,并从多普勒频谱得到了相应信号包络及其性能参数电平通过率、平均衰落时延(LCR、AFD) ,并在此基础上指出散射体数目在一定程度上影响移动通信信号的多普勒频谱 ,从而影响信号性能。

Simulation and analysis are performed on the Doppler spectrum according to the variant amount of distributed scatters in the mobile communications. Still the signal envelopes and some statistical properties such as level crossing rate (LCR) and average fade duration (AFD) are obtained based upon the derived Doppler spectrum. It is concluded that the number of scatters places some impact on the Doppler spectrum of the mobile communication signal, and furthermore affects the signal performance of the mobile communications.